The "acronym" link navigates to the latest version of the specification, this link changes whenever a new version of the specification is published.
The "Version" link navigates to the specific version.

Name Acronym Version Status Publication Date
Total: 2
Action Language for Foundational UML ALF 1.1 formal June 2017
Precise Semantics of UML Composite Structures PSCS™ 1.2 formal June 2019